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This book provides introductory, comprehensive, and concise
descriptions of amorphous chalcogenide semiconductors and related
materials. It includes comparative portraits of the chalcogenide
and related materials including amorphous hydrogenated Si, oxide
and halide glasses, and organic polymers. It also describes effects
of non-equilibrium disorder, in comparison with those in
crystalline semiconductors.
Understanding the structural unit of crystalline solids is vital in
determining their optical and electronic properties. However, the
disordered nature of amorphous semiconductors, where no long-range
order is retained, makes it difficult to determine their structure
using traditional methods. This book shows how computer modelling
can be used to overcome the difficulties that arise in the atomic
scale identification of amorphous semiconductors. The book explains
how to generate a random structure using computer modelling,
providing readers with the techniques to construct realistic
material structures. It shows how the optical and electronic
properties are related to random structures. Readers will be able
to understand the characteristic features of disordered
semiconductors. The structural and electronic modifications by
photon irradiation are also discussed in detail. This book is ideal
for both physicists and engineers working in solid state physics,
semiconductor engineering and electrical engineering.
This book provides introductory, comprehensive, and concise
descriptions of amorphous chalcogenide semiconductors and related
materials. It includes comparative portraits of the chalcogenide
and related materials including amorphous hydrogenated Si, oxide
and halide glasses, and organic polymers. It also describes effects
of non-equilibrium disorder, in comparison with those in
crystalline semiconductors.
"Amorphous Chalcogenide Semiconductors and Glasses" describes
developments in the science and technology of this class of
materials. This book offers an up-to-date treatment of chalcogenide
glasses and amorphous semiconductors from basic principles to
applications while providing the reader with the necessary
theoretical background to understanding the material properties
technology of this class of materials. This book offers an
up-to-date treatment of chalcogenide glasses and amorphous
semiconductors from basic principles to applications while
providing the reader with the necessary theoretical background to
understanding the material properties. Chalcogenides form a special
class of materials, which have one or more of the elements from the
chalcogen group, Group VI in the Periodic Table (S, Se. or Te) as a
constituent; the chalcogen is mixed with other elements to form
various "new" compounds and alloys. Chalcogenides are
noncrystalline solids because their structure is "amorphous" or
"glassy". Such structures have totally different properties than
crystalline solids. Chalcogenide glasses have a number of very
interesting and useful properties, which have been already
exploited in the commercialization of new devices.
This book presents the current level of understanding of the structural, electronic and optical properties of amorphous semiconductors. As amorphous materials depart significantly from the crystalline counterparts, some of the basic problems associated with the validity of the effective mass approximation, whether K is a good quantum number, and concepts of phonons and excitons will be addressed in detail. A significant part of the book is devoted to present recent progress made in the understanding of light-induced degradations in amorphous semiconductors, which is regarded as the most limiting problem in device applications. The monograph presents a comprehensive review of both experimental and theoretical studies on amorphous semiconductors.
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